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Annotation of parser3/src/include/pa_xslt_stylesheet_manager.h, revision 1.1

1.1     ! parser      1: /** @file
        !             2:        Parser: sql driver manager decl.
        !             3: 
        !             4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
        !             5: 
        !             6:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
        !             7: 
        !             8:        $Id: pa_sql_driver_manager.h,v 1.8 2001/09/05 09:02:52 parser Exp $
        !             9: 
        !            10: 
        !            11:        global sql driver manager, must be thread-safe
        !            12: */
        !            13: 
        !            14: #ifndef PA_XSLT_STYLESHEET_MANAGER_H
        !            15: #define PA_XSLT_STYLESHEET_MANAGER_H
        !            16: 
        !            17: #include "pa_config_includes.h"
        !            18: #include "pa_pool.h"
        !            19: #include "pa_hash.h"
        !            20: #include "pa_stack.h"
        !            21: #include "pa_table.h"
        !            22: 
        !            23: 
        !            24: // defines
        !            25: 
        !            26: 
        !            27: // forwards
        !            28: 
        !            29: class Stylesheet_connection;
        !            30: 
        !            31: /** XSLT stylesheet driver manager
        !            32:                maintains 
        !            33:                stylesheet cache expiring unused stylesheets
        !            34: */
        !            35: class XSLT_Stylesheet_manager : public Pooled {
        !            36:        friend Stylesheet_connection;
        !            37: public:
        !            38: 
        !            39:        XSLT_Stylesheet_manager(Pool& pool) : Pooled(pool),
        !            40:                connection_cache(pool),
        !            41:                prev_expiration_pass_time(0) {
        !            42:        }
        !            43: 
        !            44:        /** 
        !            45:                check for disk update of "{file_spec}" or "{file_spec}.stamp",
        !            46:                if not updated return cached version[if any] otherwise load/compile/return
        !            47:        */
        !            48:        Stylesheet_connection& get_connection(const String& file_spec);
        !            49: 
        !            50: private: // stylesheet cache
        !            51: 
        !            52:        Stylesheet_connection *get_connection_from_cache(const String& file_spec);
        !            53:        void put_connection_to_cache(const String& file_spec, Stylesheet_connection& stylesheet);
        !            54:        void maybe_expire_connection_cache();
        !            55: private:
        !            56:        time_t prev_expiration_pass_time;
        !            57: 
        !            58: private: // for stylesheet
        !            59: 
        !            60:        /// caches connection
        !            61:        void close_connection(const String& file_spec, Stylesheet_connection& stylesheet);
        !            62: 
        !            63: private:
        !            64: 
        !            65:        Hash connection_cache;
        !            66: };
        !            67: 
        !            68: /// global
        !            69: extern XSLT_Stylesheet_manager *XSLT_stylesheet_manager;
        !            70: 
        !            71: #endif